在
<span class='topic'>
<% if reply.target_type == "Topic" %>
  <%= topic_title_tag(reply&.target) %>
<% elsif  reply.target_type == "Article"%>
  专栏文章：<%= article_title_tag(reply&.target) %>
  <% else %>
  <%= topic_title_tag(reply&.target&.topic) %>
<% end %>
</span> 中提及了此贴
